delete from Tb_ResponsavelAluno
delete from Tb_Responsavel
delete from Tb_Turma
delete from Tb_AlunoTurma
delete from tb_aluno
delete from tb_professor
delete from Tb_ProfessorDisciplina
delete from tb_responsavel
delete from tb_usuario
delete from tb_turmadisciplina
delete from Tb_Responsaveis_Extrato_Financeiro
delete from tb_disciplina
delete from tb_boletim
delete from tb_frequencia
delete from tb_nota

EXEC sp_MSForEachTable 'DISABLE TRIGGER ALL ON ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'DELETE FROM ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? CHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable 'ENABLE TRIGGER ALL ON ?'
GO